eng turtle assistant to mining well

local cnt=0
local hasChargeStation=false;
--cnt=0
args={...}
turtle.select(2)
if(args[1]==nil) then
else
if not turtle.compare() then
turtle.back()
--turtle.select(2)
turtle.place()
end
end
--if turtle.getItemCount(4)>0 then hasChargeStation = true end

while true do
turtle.select(2)


while turtle.compareDown() do

--check fuel first
while  turtle.getFuelLevel()<40 do
        if(hasChargeStation) then
        turtle.up()
        turtle.select(4)
        turtle.placeDown()
        sleep(10)
        turtle.digDown()
        turtle.down()
        turtle.select(2)
        else
            print(" I need more fuel")
            for k=1,4 do turtle.turnLeft() end
            shell.run("refuel all")
            sleep(5);

        end
    end
cnt=cnt+1
turtle.back()

if not turtle.detectDown() and turtle.getItemCount(2)>48 then
    redstone.setOutput("bottom",true)

    turtle.down()
    --turtle.turnRight()
    turtle.select(1)
    turtle.transferTo(16,1)
    turtle.select(2)
    turtle.transferTo(1,32)
    turtle.select(1)
    while not turtle.detectDown() do
    sleep(1)
    end
    --redstone.setOutput("bottom",false)
    while( turtle.getItemCount(1)>0) do sleep(0.5) end
    turtle.select(16)
    turtle.transferTo(1,1)
    --redstone.setOutput("bottom",true)
    --turtle.drop()
    turtle.up()
    --turtle.turnLeft()
    turtle.select(2)
    redstone.setOutput("bottom",false)
end

sleep(0.5)

end

if cnt>7 then
cnt=0
turtle.select(2)
turtle.placeDown()
turtle.turnRight()
turtle.forward()
turtle.select(1)
turtle.placeDown()
turtle.back()
turtle.attackDown()
turtle.turnLeft()

turtle.forward()
turtle.forward()
--turtle.forward()
turtle.select(2)
repeat
if turtle.compareDown() then turtle.digDown() end
until not turtle.forward()
turtle.dig()
turtle.forward()
turtle.digDown()
--turtle.back()

turtle.turnRight()
turtle.forward()
turtle.select(1)
turtle.digDown()
turtle.back()
turtle.turnLeft()

turtle.forward()
turtle.select(2)
while turtle.compareDown() do
    turtle.digDown()
end

turtle.select(2)
while not turtle.compareDown() do
turtle.back()
end
turtle.back()
turtle.back()

turtle.place()
else
sleep(2)
end

end